Ezekiel 41:6
And the side chambers were three, one over another, and thirty in order; and they entered into the wall which was of the house for the side chambers round about, that they might have hold, but they had not hold in the wall of the house.
Cross-reference
Ezekiel 41:5 provides the wall thickness (6 cubits) and side chamber width (4 cubits) that support the structural description of the three stories in 41:6.
Ezekiel 42:6 also describes three-story chambers without pillars, paralleling the three-story side chamber structure in Ezekiel 41:6 within the same vision.
1 Kings 6:6 describes the same three-story side chamber design with varying widths (5,6,7 cubits), mirroring the ledges and offset construction in Ezekiel 41:6.
1 Kings 6:10 gives the height of the side chambers (5 cubits) and how they were attached by beams, echoing the construction described in Ezekiel 41:6.
1 Kings 6:8 describes the entrance and stairs for the side chamber stories, adding detail to the three-story structure Ezekiel 41:6 mentions.